My suggestion is for alternating headlines from multiple feeds.
For example:
The option now to enter in a single feed URL and get the code.
A second option: To enter 4 feeds, and get the code for a single "merged" feed. The first item in the feed would be the first headline from feed 1 of 4. The second headline would be the first headline from feed 2 of 4. The third headline would be the first headline from feed 3 of 4, etc.
So by that sequence, the fifth headline would be the 2nd headline in feed 1 of 4, etc.